1 person found this helpful
A couple of things:
1. Lighting effects is only available in 8 bit RGB mode - so check that first.
It also requires that the GPU is supported.
2. The flashing sounds like a GPU issue.
Check your GPU drivers, ensure you are only using one GPU and try the other GPU Advanced options - Basic/Normal/Advanced
N.B There is known issue in v19.0.1 with the cursor flickering when drawing with the pen tool on a shape layer, but general flashing is not normal
Hi, yeah the bit mode is 8 RGB. I check that as well, but lightening effects is still greyed out. I'll run a few more diagnostics on the GPU.